Move solution and projects to src

src/Ryujinx.Ava/UI/Controls/NavigationDialogHost.axaml

@@ -0,0 +1,17 @@
+<UserControl 
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:ui="clr-namespace:FluentAvalonia.UI.Controls;assembly=FluentAvalonia"
+    mc:Ignorable="d" 
+    d:DesignWidth="800" 
+    d:DesignHeight="450"
+    x:Class="Ryujinx.Ava.UI.Controls.NavigationDialogHost"
+    Focusable="True">
+    <ui:Frame 
+        HorizontalAlignment="Stretch"
+        VerticalAlignment="Stretch"
+        x:Name="ContentFrame">
+    </ui:Frame>
+</UserControl>